[1] HTLV,VIRION,NEURORETROVIROL UNIT,PORTO ALEGRE,RS,BRAZIL
[2] HOSP PORTO ALEGRE,PORTO ALEGRE,RS,BRAZIL
[3] HOSP NS CONCEICAO,PORTO ALEGRE,RS,BRAZIL
[4] AIDS STD MUNICIPAL CONTROL POLICY,PORTO ALEGRE,RS,BRAZIL
[5] SANOFI WINTHROP LAB,RIO JANEIRO,BRAZIL